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[Chemical Knowledge]：Properties and Uses of Liquid Alkali

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Liquid caustic soda, also known as sodium hydroxide aqueous solution, is an important inorganic chemical raw material and is widely used in many industrial fields. The following are the main properties and uses of liquid caustic soda.

1. the nature of liquid alkali

1. physical properties: liquid alkali is colorless and transparent liquid, with strong corrosive and pungent odor. Its density increases with increasing concentration, and its viscosity increases with increasing concentration. Liquid alkali can be dissolved in water, and will release a lot of heat when dissolved.
2. Chemical properties: liquid alkali is a strong alkali with strong alkalinity. It can neutralize with acids to form salts and water. Liquid alkali can also react with many non-metallic oxides, salts, metals, etc.

2. the use of liquid alkali

in the field of chemical production raw materials, liquid alkali has a wide range of uses, the following is its main application areas:

1. Paper industry: liquid alkali in the paper industry as a cooking agent, used to remove the lignin in the wood, the cellulose is separated, so as to make pulp. In addition, the liquid alkali is also used to adjust the pH of the pulp and to promote the bleaching and deinking of the paper.
2. Textile industry: Liquid alkali is used as a mercerizing agent in the textile industry to make natural fibers such as silk and wool smoother and shiny, and to improve their strength and elasticity.
3. Production of soaps and detergents: Liquid caustic soda is used in the production of soaps and detergents and can react with oils and fats to produce sodium fatty acids, which is an effective surfactant.
4. Alumina production: liquid alkali is used as a solvent in alumina production to dissolve alumina in bauxite, so as to produce sodium aluminate solution, which can be further processed to obtain alumina.
5. Petroleum industry: Liquid caustic soda is used in the petroleum industry to remove acidic gases in drilling mud, as well as to adjust the pH value of oil fields to prevent equipment corrosion.

In short, liquid alkali has a wide range of uses in the field of chemical production raw materials, and plays an important role in the development of many industrial fields.

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